The XtVaCreateArgsList
function allocates memory and copies its arguments into a single list
pointer, which may be used with XtVaNestedList. The end of both lists
is identified by a name entry containing NULL. Any entries of type XtVaTypedArg
are copied as specified without applying conversions. Data passed by reference
(including Strings) are not copied, only the pointers themselves; the caller
must ensure that the data remain valid for the lifetime of the created
varargs list. The list should be freed using XtFree when no longer needed.